Campbell Enterprises Header
Shop By Vehicle
Shop By Brand
Search For Parts
LiveZilla Live Chat Software

KB Mopar Chrysler Dodge Plymouth 318 Pistons

Keith Black 400 Pistons

KB Hypereutectic Chrysler 5.2 318 Pistons

High performance KB Chrysler 318 pistons offer a significant performance improvement for your engine, at a very affordable price. We have these piston sets available in a wide range of sizes including standard bore and many popular oversizes. If you are rebuilding a Chrysler, Plymouth, Mopar, Dodge 318 5.2 engine and are looking for improved performance, without the higher cost of forged pistons, KB performance pistons are an excellent alternative for many street, muscle car restoration, cruising and street / strip applications. We have 318 flat top pistons as well as 318 high compression dome top pistons.

Mopar 318 and 5.2L Magnum Engine Specs

For reference the original stock specifications were:

  • Engine block deck height 9.600 inches
  • Cylinder bore standard size 3.910 inches
  • Crankshaft stock stroke 3.310
  • Connecting rod length 6.123 inches
  • Wrist pin diameter .984

We do not recommend hypereutectic pistons for use with superchargers, turbochargers, nitrous systems or for serious racing engines. For those applications we strongly recommend forged pistons. Our complete piston index list for stock replacement, cast, hypereutectic and forged pistons is available here: CE Engine Pistons Index

Keith Black Mopar 318 Piston Features:

  • Hypereutectic 390 Alloy
  • Fully machined head and valve reliefs
  • Accumulator groove to aid with compression ring seal
  • Diamond finished skirts
  • CNC machined pin bores to insure straight and accurately sized bores

KB 318 Pistons for Chrysler Dodge Plymouth 318 and 5.2 Magnum Engines

  • Ring grooves are 5/64 5/64 3/16
  • Crankshaft These pistons are for use with a stock stroke 318 / 5.2 crank
  • Connecting Rods These pistons are for use with stock length rods 6.123 inches long with a .984 wrist pin size and will work with stock or aftermarket connecting rods
  • CH Compression Height This is the measurement from the centerline of the piston pin bore to the top flat part of the piston
  • Wt Piston weight in grams
  • ccs displacement of dome, or dish, and valve reliefs, measured in ccs
  • CR Compression ratio estimates based on a .030 oversize, zero deck and .039 compressed head gasket
  • Bore Size Finished bore size, in inches, that piston is designed for

What is Included?

  • Piston set includes 8 pistons, 8 wrist pins and spiral locks
  • Piston and ring kit includes 1 Complete piston set and 1 Moly piston ring set

318 Flat Top Pistons

KB167 318 Piston

CH Wt ccs CR with head chamber of: Bore Size Piston Set Piston and Ring Kit
57cc 60cc 64cc 68cc
1.810 507 -5 10.4 10.1 9.6 9.2 3.910
standard
KB167

Add To Cart
KB167 KTM

Add To Cart
3.930
. 020 over
KB167 20

Add To Cart
KB167 KTM20

Add To Cart
3.940
.030 over
KB167 30

Add To Cart
KB167 KTM30

Add To Cart
3.950
.040 over
KB167 40

Add To Cart
KB167 KTM40

Add To Cart
3.970
.060 over
KB167 60

Add To Cart
KB167 KTM60

Add To Cart

High Compression 318 Dome Top Pistons

KB399 318 Dome Top Piston

CH Wt ccs CR with head chamber of: Bore Size Piston Set Piston and Ring Kit
57cc 60cc 64cc 68cc
1.810 541 6 12.2 11.7 11.0 10.4 3.910
standard
KB399

Add To Cart
KB399 KTM

Add To Cart
3.930
. 020 over
KB399 20

Add To Cart
KB399 KTM20

Add To Cart
3.940
.030 over
KB399 30

Add To Cart
KB399 KTM30

Add To Cart
3.950
.040 over
KB399 40

Add To Cart
KB399 KTM40

Add To Cart
3.970
.060 over
KB399 60

Add To Cart
KB399 KTM60

Add To Cart

Mopar 318 A, LA and Magnum Series Connecting Rods

While you are replacing your engine pistons it is a good time to also upgrade your rotating assembly by installing modern connecting rods. Why risk damage to your rebuilt performance engine by using old stock connecting rods that have been through who knows what kind of abuse.

With the high cost of machine shop service these days you can often upgrade to far stronger modern rods for not much more than the cost of reconditioning a set of stock rods.

Molnar Technologies 4340 Steel Billet H Beam 318 Connecting Rods

molnar 340 h beam connecting rod

Molnar Technologies H Beam 318 5.2 rods are machined from billet 4340 steel, and then heat treated to provide improved strength. To make the rods even stronger, they are shot peened to which also increases fatigue life. All Molnar connecting rods are fitted with highly durable premium bronze bushings for use with floating pin type pistons. Each rod set includes ARP fasteners, moly lubricant and installation guidelines.

All Molnar rods are finished in the United States at the Molnar Technologies shop in Michigan. Critical rod dimensions are are held to very precise tolerances of +/- .0001 of an inch, which is the tightest tolerance you will find in the performance and racing aftermarket.

  • Description and Length Engine model that rod is made to for and length of the rod, as measured center to center, in inches.
  • Weight Weight in grams, of one complete connecting rod assembly
  • Bolt Size Bolt dimensions in inches, Rods come with ARP2000 fasteners installed
  • Rod Pin Size Crank rod journal diameter
  • Pin Size Piston pin diameter, in inches
  • BE Width Width of the crankshaft end of one rod
  • PE Width Width of the piston end of one rod
  • Part Number Molnar Technologies rod set part number. Set includes 8 connecting rods
Description and Length Weight Bolt Size Rod Pin Size Pin Size BE Width PE Width Part Number
6.123 Chrysler with .984" Pin 623 7/16 2.125 0.984 0.927 1.03 DH6123TSB8-A

Add To Cart

 

Eagle SIR 318 I beam connecting rods

Eagle 340 I beam connecting rod

Eagle Specialty Products SIR connecting rods are an economically priced alternative to the time and expense involved in reworking a set of stock OEM rods. SIR connecting rods are forged from 5140 steel and most are available for both pressed fit pin use, or bushed to work with full floating piston pins. ESP I beam SIR Eagle connecting rods utilize ARP 3/8" Wave Lok bolts and nuts. Eagle SIR rods are economically priced and are often less expensive than having your old stock rods reconditioned.

Length Pin Notes Part Number
6.123" .984 bronze bushed Full floating, stock 318 and 5.2 Magnum length SIR6123CB
$377.60 $358.72

Add To Cart

 

Campbell Enterprises Performance Parts | About | Contact Info | Privacy Policy | Terms
copyright © Motorsports Parts Corporation T/A Campbell Enterprises. All rights reserved